; clang -target aarch64-eabi -O2 -march=armv8.5-a+memtag -fsanitize=memtag -S -emit-llvm test.cc
; void bar() {
; throw 42;
; }
; void foo() {
; int A0;
; __asm volatile("" : : "r"(&A0));
; try {
; bar();
; } catch (int exc) {
; }
; throw 15532;
; }
; int main() {
; try {
; foo();
; } catch (int exc) {
; }
; return 0;
; }
; RUN: opt -S -aarch64-stack-tagging %s -o - | FileCheck %s
target datalayout = "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128"
target triple = "aarch64-unknown-unknown-eabi"
@_ZTIi = external dso_local constant i8*
; Function Attrs: noreturn sanitize_memtag
define dso_local void @_Z3barv() local_unnamed_addr #0 {
entry:
%exception = tail call i8* @__cxa_allocate_exception(i64 4) #4
%0 = bitcast i8* %exception to i32*
store i32 42, i32* %0, align 16, !tbaa !2
tail call void @__cxa_throw(i8* %exception, i8* bitcast (i8** @_ZTIi to i8*), i8* null) #5
unreachable
}
declare dso_local i8* @__cxa_allocate_exception(i64) local_unnamed_addr
declare dso_local void @__cxa_throw(i8*, i8*, i8*) local_unnamed_addr
; Function Attrs: noreturn sanitize_memtag
define dso_local void @_Z3foov() local_unnamed_addr #0 personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*) {
entry:
%A0 = alloca i32, align 4
%0 = bitcast i32* %A0 to i8*
call void @llvm.lifetime.start.p0i8(i64 4, i8* nonnull %0) #4
call void asm sideeffect "", "r"(i32* nonnull %A0) #4, !srcloc !6
invoke void @_Z3barv()
to label %try.cont unwind label %lpad
lpad: ; preds = %entry
%1 = landingpad { i8*, i32 }
cleanup
catch i8* bitcast (i8** @_ZTIi to i8*)
%2 = extractvalue { i8*, i32 } %1, 1
%3 = call i32 @llvm.eh.typeid.for(i8* bitcast (i8** @_ZTIi to i8*)) #4
%matches = icmp eq i32 %2, %3
br i1 %matches, label %catch, label %ehcleanup
catch: ; preds = %lpad
%4 = extractvalue { i8*, i32 } %1, 0
%5 = call i8* @__cxa_begin_catch(i8* %4) #4
call void @__cxa_end_catch() #4
br label %try.cont
try.cont: ; preds = %entry, %catch
%exception = call i8* @__cxa_allocate_exception(i64 4) #4
%6 = bitcast i8* %exception to i32*
store i32 15532, i32* %6, align 16, !tbaa !2
call void @__cxa_throw(i8* %exception, i8* bitcast (i8** @_ZTIi to i8*), i8* null) #5
unreachable
ehcleanup: ; preds = %lpad
call void @llvm.lifetime.end.p0i8(i64 4, i8* nonnull %0) #4
resume { i8*, i32 } %1
}
; Function Attrs: argmemonly nounwind willreturn
declare void @llvm.lifetime.start.p0i8(i64 immarg, i8* nocapture) #1
declare dso_local i32 @__gxx_personality_v0(...)
; Function Attrs: nounwind readnone
declare i32 @llvm.eh.typeid.for(i8*) #2
declare dso_local i8* @__cxa_begin_catch(i8*) local_unnamed_addr
declare dso_local void @__cxa_end_catch() local_unnamed_addr
; Function Attrs: argmemonly nounwind willreturn
declare void @llvm.lifetime.end.p0i8(i64 immarg, i8* nocapture) #1
; Function Attrs: norecurse sanitize_memtag
define dso_local i32 @main() local_unnamed_addr #3 personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*) {
entry:
; CHECK-LABEL: entry:
%A0.i = alloca i32, align 4
%0 = bitcast i32* %A0.i to i8*
call void @llvm.lifetime.start.p0i8(i64 4, i8* nonnull %0) #4
call void asm sideeffect "", "r"(i32* nonnull %A0.i) #4, !srcloc !6
; CHECK: call void @llvm.aarch64.settag(i8* %1, i64 16)
; CHECK-NEXT: call void asm sideeffect
%exception.i6 = call i8* @__cxa_allocate_exception(i64 4) #4
%1 = bitcast i8* %exception.i6 to i32*
store i32 42, i32* %1, align 16, !tbaa !2
invoke void @__cxa_throw(i8* %exception.i6, i8* bitcast (i8** @_ZTIi to i8*), i8* null) #5
to label %.noexc7 unwind label %lpad.i
.noexc7: ; preds = %entry
unreachable
lpad.i: ; preds = %entry
%2 = landingpad { i8*, i32 }
cleanup
catch i8* bitcast (i8** @_ZTIi to i8*)
%3 = extractvalue { i8*, i32 } %2, 1
%4 = call i32 @llvm.eh.typeid.for(i8* bitcast (i8** @_ZTIi to i8*)) #4
%matches.i = icmp eq i32 %3, %4
br i1 %matches.i, label %catch.i, label %ehcleanup.i
catch.i: ; preds = %lpad.i
%5 = extractvalue { i8*, i32 } %2, 0
%6 = call i8* @__cxa_begin_catch(i8* %5) #4
call void @__cxa_end_catch() #4
%exception.i = call i8* @__cxa_allocate_exception(i64 4) #4
%7 = bitcast i8* %exception.i to i32*
store i32 15532, i32* %7, align 16, !tbaa !2
invoke void @__cxa_throw(i8* %exception.i, i8* bitcast (i8** @_ZTIi to i8*), i8* null) #5
to label %.noexc unwind label %lpad
.noexc: ; preds = %catch.i
unreachable
ehcleanup.i: ; preds = %lpad.i
call void @llvm.lifetime.end.p0i8(i64 4, i8* nonnull %0) #4
br label %lpad.body
lpad: ; preds = %catch.i
%8 = landingpad { i8*, i32 }
catch i8* bitcast (i8** @_ZTIi to i8*)
%.pre = extractvalue { i8*, i32 } %8, 1
br label %lpad.body
lpad.body: ; preds = %ehcleanup.i, %lpad
%.pre-phi = phi i32 [ %3, %ehcleanup.i ], [ %.pre, %lpad ]
%eh.lpad-body = phi { i8*, i32 } [ %2, %ehcleanup.i ], [ %8, %lpad ]
%matches = icmp eq i32 %.pre-phi, %4
br i1 %matches, label %catch, label %eh.resume
catch: ; preds = %lpad.body
%9 = extractvalue { i8*, i32 } %eh.lpad-body, 0
%10 = call i8* @__cxa_begin_catch(i8* %9) #4
call void @__cxa_end_catch() #4
ret i32 0
eh.resume: ; preds = %lpad.body
resume { i8*, i32 } %eh.lpad-body
}
attributes #0 = { noreturn sanitize_memtag "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "frame-pointer"="all" "less-precise-fpmad"="false" "min-legal-vector-width"="0" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="generic" "target-features"="+mte,+neon,+v8.5a" "unsafe-fp-math"="false" "use-soft-float"="false" }
attributes #1 = { argmemonly nounwind willreturn }
attributes #2 = { nounwind readnone }
attributes #3 = { norecurse sanitize_memtag "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "frame-pointer"="all" "less-precise-fpmad"="false" "min-legal-vector-width"="0" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="generic" "target-features"="+mte,+neon,+v8.5a" "unsafe-fp-math"="false" "use-soft-float"="false" }
attributes #4 = { nounwind }
attributes #5 = { noreturn }
!llvm.module.flags = !{!0}
!llvm.ident = !{!1}
!0 = !{i32 1, !"wchar_size", i32 4}
!1 = !{!"clang version 10.0.0 (https://github.com/llvm/llvm-project.git c38188c5fe41751fda095edde1a878b2a051ae58)"}
!2 = !{!3, !3, i64 0}
!3 = !{!"int", !4, i64 0}
!4 = !{!"omnipotent char", !5, i64 0}
!5 = !{!"Simple C++ TBAA"}
!6 = !{i32 70}